Photographic camera



J. S. GREENE.

FHOTOGRAFHIC CAMERA.

APPLICATION FILED OCT. 8, 1920.

Patented Apr. 11, 1922.

3 SHhEl'S-SHEET INVENTOR. cfaiii 6: $296M? BY gull ATTORNEY J. S.GREENE. PHOTQGRAP HIC CAMERA.

APPLICATION FILED OCT. 8. 1920.

Patented Apr. 11, 1922.

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APPLICATION FILED OCT. 8, I920.

Patented Apr. 11, 1922'.

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23 A TTORNEY UNITED STATES PATENT oF icE.

" JOHN s. GREENE, or ROCHESTER, NEW. YORK, ASSFIGNOR T0 PHOTOSTAT coTION, or rnovmmron, nnonr: rsrirmn, A CORPORATION or moms:- ISLAND.

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, graphic cameras of the type known as commercial cameras in whichprints of objects positioned on the copyholder of the camera arephotographed, out, developed and fixed in the one apparatus and emergeready for use after'drying. The film or sensitive paper is usually fedfrom -a roll andsevered I according to the surface exposed. For smallphotographs only a portion of the normal feed isused and the remainderof the strip in the focal plane is masked off for thispurpose,heretofore usually by means of a dark slide. My present improvements aredi- 5 rected toward supplanting such dark slide with a curtainadjustable in front of the focal plane to give an infinite number ofdifferent sizes of prints that may. be made according to the size of theobject, or otherwise, without exposing more paper than is required andthe inventionhas for its object to provide a simple, efficient, durableand' conveniently operable curtain of this charac-v ter. To theseandoth'er ends. the invention resides in certain improvements andcombinations of parts, all as will be hereinafter more fully describedthe novel features being pointed out inthe claims at the end of thespecification.

In the drawings I v -Figure 1 is aside view of alcommercial cameraprovided with a masking curtain constructed in accordance with andillustrating one embodiment of my invention;

Figure 2'is an enlarged fragmentary view, partly in section of the frontof the curtain and the film support; J Figure 3 is a fragmentary sectionon the line 3-3 of Figure 2;

Figure .4 is an enlarged section on the line H of Figure l, and

Figure 5 is a section on the line 5 -5 of Figure 2.

V Ali ilicationfiled October a, 1920. Serial' No..415,505.

Similar reference numerals throughout the several views indicate thesame parts.

, Referring first to general features of the J camera as shown in Figurel, A indicates a table or frame upon which is supported a bed B carryingacamera body comprising a fixed portion 1 and a laterally displaceableportion 2. A bellows 3 connects the forwardportion lof the body withafront 4 carrying a lens and prism 5 adapted to projfect an image froman object arranged upon a vertically adjustable. copy board 6. The

front 4 by means of set screws 7, is adjust-v able vertically upon guiderods8 to bring the axis of the lens opposite the center of the entirefield of exposure or any lower portion thereof so that a picture may beproperly positioned or centered on only the lower half, for instance,-ofthe entire possible field of exposure. At the front of the portion 2 ofthe body,

which cooperates with the exposure opening at the rear of the fixedportion 1, is a film supporting wall '8 lying in the focal plane of thecamera lens. In rear of the upper portion of this support 8 is a spaceor chamber 9 for the roll of film or sensitive paper (notshown) fromwhich theffilm strips I indicated at 10" are drawn b etween guiderollers 11,}down across the 'face of the support 8 and issue at 12through a slot at "the bottom thereof and pass into the developingapparatus,,all of the foregoing being well known structure.

which has'been drawn into the upper half of the plane of exposure bymeansofa fiex ible curtain 13 as shown in Figures 2 and 5 which curtainmay be made of rubber cloth or any of the other materials known to theart. This'curtain is carried by means of cross b31314: and 15 upon anendless carrier 16 in the present form of'a chain conveyor which travelsupon sprockets 17, 18, 19., 2'0 and 21. The first two mentionedsprockets are respectively above and below and tangential to the filmsupport 8? in the focal plane the sprockets 19 and 20 are aboveand-below at the rear portion of the vbody section 2 and the sprocket 21is arranged at,

a central point, as shown and its engagement 5 upon the shaft 23 of oneof the lower feed .rollers 24 that draw the sensitive paper 10 throughthe field of exposure.

On the exterior of the section 2 of the camera body is an operatingknob25 turning in connection with a dial 26 on a shaft 27 having suitablebearings in the camera walls and to which the knob is secured, in. thepresent instance, by a set screw 28 (Figure 4). Fixed to the shaft 27 isa gear 29 meshing with a pinion 30 on the shaft 31 to which sprocket 21is also fixed. The. latter is the driving sprocket for the chain carrierand when the knob 25 is turned, the carrier and curtain 13 will be movedto an extent indi 'cated on the dial 26. It is unnecessary to carry thecurtain through a complete circuit as the carrier has ample length andit is therefore merely raised and lowered c y turningthe knob in firstone direction and then the other. When raised from the position ofFigure 5, a projecting flange 82 on the cross bar 15 cooperates with anabutment 33 at the top of the film support to arrest the movement of thecurtain after the field of maximum exposure has been completely uncovered.

The curtain is entirely closed to prevent fogging the sensitive materialwhen the camera body is opened up, that is, the section 2 isseparatedfrom section 1.

the curtain comprising achain an rality of fixed sprocket Wheels forguiding adjustable to different positions with reference to saidopening, an endless carrier for a pluthe same, and a rotary operatingmeans for the curtain on the exterior of the camera arranged to meshwith one of said sprockets. 3. In a camerapthe combination with a bodyhaving an exposure opening in the focal plane of the camera and. a rollholder in the rear of said plane, of a dark curtain adjustable todifferent positions with reference to said opening, an endless carrierfor the curtain surrounding the roll holder, and operating means for thecarrier on the exterior of the body.

4. In a camera, the combination with a body having a roll holdingchamber, a film support in the focal plane of the camera at the front ofsaid chamber and sprockets above and below said support and at the rearof the chamber, of a dark curtain adjustable in front of the filmsupport, an endless carrier therefor passing over the sprockets and anoperating means on the exterior ofthe body geared to the carrier.

JOHN S. GREENE

